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Finding the Fourth Proportional to 502,467.80, 753,701.70 and 128,490.80

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Solution

The fourth proportional to 502,467.80, 753,701.70 and 128,490.80 is: 192,736.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,467.80 : 753,701.70 = 128,490.80 : x
  2. Step 2: Convert to fraction form
    502,467.80/753,701.70 = 128,490.80/x
  3. Step 3: Cross multiply
    502,467.80x = 753,701.70 × 128,490.80
  4. Step 4: Simplify right side
    502,467.80x = 96,843,734,394.36
  5. Step 5: Solve for x
    x = 96,843,734,394.36/502,467.80
  6. Step 6: Final answer
    x = 192,736.20

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.